Thanks! I wonder if it is possible to operate on djvu files directly, without converting to other formats. I knew that the job can be done by converting djvu files to pdf files, and then operate on pdf files and finally convert back to djvu files.
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TimDec 6 '11 at 21:38

There aren't so many tools that can operate directly on DjVu files, compared with other more common formats such as PDF or JPEG. With image manipulation programs, there's the added hurdle that most of these operate on a single image at a time, but the DjVu file contains multiple pages.

Thanks, but the link is to extract some pages from a djvu file into a new djvu file. I would like to split each djvu page into two djvu pages in a djvu file.
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TimDec 6 '11 at 19:58

yeah, idea is to extract all the pages as individual from djvu file and then merge the even number of files into single djvu file and repeat this for every 2 files. Finally, merge all the doubly-paged single djvu files into single djvu file.
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Nikhil MulleyDec 6 '11 at 20:12

I don't quite understand your comment. How do you solve the question in my post?
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TimDec 6 '11 at 20:31

I need to get djvu tools installed on my system and will try to give you a work around.
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Nikhil MulleyDec 6 '11 at 20:39